Water-based bi-component polyurethane finishing coat and preparation method thereof

A polyurethane topcoat, water-based two-component technology, applied in polyurea/polyurethane coatings, radiation-absorbing coatings, coatings, etc., can solve the problems of low gloss, poor weather resistance, poor water resistance, etc., and achieve simple operation and coating Layers for a smooth, high-gloss effect

Active Publication Date: 2018-12-14
HEBEI CHENYANG INDAL & TRADE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems of poor water resistance, low hardness, poor weather resistance, poor fullness and low gloss of water-ba

Method used

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  • Water-based bi-component polyurethane finishing coat and preparation method thereof
  • Water-based bi-component polyurethane finishing coat and preparation method thereof
  • Water-based bi-component polyurethane finishing coat and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Embodiments of the present invention provide a water-based two-component polyurethane topcoat and a preparation method thereof, comprising the following raw materials in parts by weight:

[0033] A component:

[0034]

[0035] B component:

[0036] Polyisocyanate curing agent 10%.

[0037] Among them, the anionic water-based acrylic resin is the water-based hydroxyl acrylic resin Bayhydrol A145 of German Bayer Chemical and the water-based acrylic resin Maincote of American Dow Chemical. TM HG-54C is a mixture mixed in a mass ratio of 2:1, the pigment is TR92 from Huntsman in the United States, the dispersant is HLD-18 / AJ from Silcona in Germany, and the water-based defoamer is Surfynol MD-20 from Gas Chemical in the United States. The substrate wetting agent is C-600 from Silcona in Germany, the UV absorber is TINUVIN 1130 from BASF, the light stabilizer is TINUVIN 292 from BASF, the thickener is Tego 3010, and the polyisocyanate curing agent is N3390 from Bayer. ...

Embodiment 2

[0044] Embodiments of the present invention provide a water-based two-component polyurethane topcoat and a preparation method thereof, comprising the following raw materials in parts by weight:

[0045] A component:

[0046]

[0047] B component:

[0048] Polyisocyanate curing agent 15%.

[0049] Among them, the anionic water-based acrylic resin is the water-based hydroxyl acrylic resin Bayhydrol A145 of German Bayer Chemical and the water-based acrylic resin Maincote of American Dow Chemical. TM HG-54C is a mixture mixed in a mass ratio of 2.5:1, the pigment is TR92 from Huntsman in the United States, the dispersant is HLD-18 / AJ from Silcona in Germany, and the water-based defoamer is Surfynol MD-20 from Gas Chemical in the United States. The substrate wetting agent is C-600 from Silcona in Germany, the UV absorber is TINUVIN 1130 from BASF, the light stabilizer is TINUVIN 292 from BASF, the thickener is Tego 3010, and the polyisocyanate curing agent is N3390 from Bayer...

Embodiment 3

[0056] Embodiments of the present invention provide a water-based two-component polyurethane topcoat and a preparation method thereof, comprising the following raw materials in parts by weight:

[0057] A component:

[0058]

[0059]

[0060] B component:

[0061] Polyisocyanate curing agent 10%.

[0062] Among them, the anionic water-based acrylic resin is the water-based hydroxyl acrylic resin Bayhydrol A145 of German Bayer Chemical and the water-based acrylic resin Maincote of American Dow Chemical. TM HG-54C is a mixture mixed in a mass ratio of 3:1, the pigment is TR92 from Huntsman in the United States, the dispersant is HLD-18 / AJ from Silcona in Germany, and the water-based defoamer is Surfynol MD-20 from Gas Chemical in the United States. The substrate wetting agent is C-600 from Silcona in Germany, the UV absorber is TINUVIN 1130 from BASF, the light stabilizer is TINUVIN 292 from BASF, the thickener is Tego 3010, and the polyisocyanate curing agent is N3390 ...

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Abstract

The invention relates to a water-based bi-component polyurethane finishing coat and a preparation method thereof. The finishing coat is prepared from a component A and a component B, and comprises thefollowing raw materials: anionic water-based acrylic resin water-based solution, pigment, a dispersing agent, a water-based defoaming agent, a base material wetting agent, an ultraviolet absorbent, alight stabilizer, deionized water, a thickening agent, and a polyisocyanate curing agent. The finishing coat has high water resistance, chemical resistance, high hardness, high fullness, and high glossiness, and can completely satisfy the coating of the high-end industrial field finishing coat, and has a good inhibition effect on the glossiness reduction, the cracking, the bubbles, the delayering, and the color change; and the problems of dark bubbles and miliaria when constructing in the high-temperature and high-humidity environment in summer are avoided.

Description

technical field [0001] The invention relates to the field of water-based industrial coatings, in particular to a water-based two-component polyurethane topcoat and a preparation method thereof. Background technique [0002] Solvent-based two-component polyurethane coatings are widely used in industrial fields such as vehicles, ships, and petrochemical equipment because of their excellent wear resistance, flexibility, durability, corrosion resistance, insulation, and high decorative properties. However, solvent-based polyurethane coatings contain a large amount of volatile organic solvents (VOC) and free isocyanates, which seriously affect people's health and living environment. Water-based two-component polyurethane started late, and the current water-based polyurethane topcoat has many limitations, such as poor water resistance, low hardness, poor weather resistance, poor fullness, low gloss, etc. Under construction, the surface of the paint film is prone to defects such a...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D5/32C09D5/08C09D7/48C09D7/61
CPCC09D175/04C09D5/08C09D5/32C09D7/48C09D7/61C08K2003/2241C08K3/22
Inventor 李幕英程璐董立志胡中源王洁
Owner HEBEI CHENYANG INDAL & TRADE GROUP CO LTD
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